I just purchased an old Croton Nivada Grenchen 'Sea Blade' watch.
I can't open it up to take pictures but it's 1958, 17 jewel, incabloc, waterproof, and you can see in the pictures (if attachment worked) it was engraved in 1958.
Chromed case measures 31.3mm diameter (excluding crown), 39.3mm lug to lug.
It seems to be running fine, keeps time. A little banged up looking, as you can see from pics. Silver dial, according to seller, now kinda yellowed. I took it into repair shop and the owner told me it had only been serviced twice, the last time being in the early 60's. It would be $70 to get serviced, but I bought it for considerably less than that.
I like the watch but would like as much info on it as possible and ask if you all think it would be worth $70. Otherwise, the owner told me I could just let it run, since it seems to have been going fine since over 40 years without service!
But i was able to glean from this forum that Croton was a decent brand back when this watch was made but went downhill later, that they imported nivada grenchen to U.S. and put their name on it? And nivada grenchen is Swiss?
Any information on Croton, Nivada Grenchen and of course my specific watch - Croton Nivada Grenchen Sea Blade would be much appreciated.